CHAPTER 7 NOTES ON TARGET SYSTEMS
User’s Manual U17307EJ2V0UM
62
The following show examples of the interface circuits of UART (asynchronous communication port).
Refer to the above design proposal for the pin processing of the device to be used.
Figure 7-1. UART Interface Circuit Example
V
CC
JUMPER
User reset circuit
V
CC
V
CC
V
CC
Connector
Microcontroller
IC
GND
RESET
DGDATA
V
DD
DGDATA
N.C.
N.C.
N.C.
DGCLK
N.C.
N.C.
N.C.
N.C.
DGCLK
N.C.
N.C.
X1
X2
V
DD
V
SS
RESET
7616-5002SC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
R
R
Cautions 1. The FPL2 generally performs normally without pin connection.
2. If the signals (X1, X2, RESET) used by the FPL2 are connected, pull up (or pull down),
referring to CHAPTER 8 CIRCUIT DIAGRAMS.
3. Isolate the oscillator.
4. Pin 3 and pin 5 (DGDATA) are functionally equivalent. Pin 9 and pin 14 (DGCLK) are
functionally equivalent. Connect the respective pins.
